Stock Based Compensation - Summary of additional information for options outstanding and exercisable (Details)	12 Months Ended
	Jun. 30, 2020 $ / shares shares
1.17 - 6.99 Exercise Prices
Schedule Of Share Based Compensation Stock Options Activity [Line Items]
Options Outstanding, Number | shares	23,250
Options Outstanding, Weighted Average Remaining Life	6 years 8 months 12 days
Option Outstanding, Weighted Average Exercise Price | $ / shares	$ 2.51
Options Exercisable, Number | shares	15,750
Options Exercisable, Weighted Average Exercise Price | $ / shares	$ 3.13
7.0 Exercise Prices
Schedule Of Share Based Compensation Stock Options Activity [Line Items]
Options Outstanding, Number | shares	15,000
Options Outstanding, Weighted Average Remaining Life	1 year 2 months 12 days
Option Outstanding, Weighted Average Exercise Price | $ / shares	$ 7.00
Options Exercisable, Number | shares	15,000
Options Exercisable, Weighted Average Exercise Price | $ / shares	$ 7.00
7.01 - 10.08 Exercise Prices
Schedule Of Share Based Compensation Stock Options Activity [Line Items]
Options Outstanding, Number | shares	4,500
Options Outstanding, Weighted Average Remaining Life	10 months 24 days
Option Outstanding, Weighted Average Exercise Price | $ / shares	$ 7.89
Options Exercisable, Number | shares	4,500
Options Exercisable, Weighted Average Exercise Price | $ / shares	$ 7.89
1.17 - 10.08 Exercise Prices
Schedule Of Share Based Compensation Stock Options Activity [Line Items]
Options Outstanding, Number | shares	42,750
Options Outstanding, Weighted Average Remaining Life	4 years 1 month 6 days
Option Outstanding, Weighted Average Exercise Price | $ / shares	$ 4.65
Options Exercisable, Number | shares	35,250
Options Exercisable, Weighted Average Exercise Price | $ / shares	$ 5.38